Study Item Parameters of Classical and Modern Theory of Differential Aptitude Test: Is it Comparable?

<p style="text-align: justify;">This study aimed to find the Classical Test Theory (CTT) and Modern (MTT) item parameters of Differential Aptitude (DAT) examined their comparability them. The being studied are difficulty level discrimination index. 5.024 data result sub-test DAT were documented by Department Psychology Guidance Counselling bureau. parameter classical modern test items was estimated correlated examining between parameters. results show that there is a significant correlation estimates. Rasch IRT 1-PL models have highest toward CTT regarding level. In contrast, model 2-PL has in Overall, concluded MTT comparable estimating thus could be used independently or complementary developing DAT.</p>